Murexide
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Murexide
structure -
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CAS No:
3051-09-0
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Formula:
C8H5N5O6.H3N
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Chemical Name:
Murexide
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Synonyms:
2,4,6(1H,3H,5H)-Pyrimidinetrione,5-[(hexahydro-2,4,6-trioxo-5-pyrimidinyl)imino]-,ammonium salt (1:1);Barbituric acid,5,5′-nitrilodi-,monoammonium salt;2,4,6(1H,3H,5H)-Pyrimidinetrione,5-[(hexahydro-2,4,6-trioxo-5-pyrimidinyl)imino]-,monoammonium salt;Murexide;Purpuric acid ammonium salt;Ammonium purpurate;Ammonium 5-(2,4,6-trioxoperhydropyrimidin-5-ylideneamino)barbiturate;134-02-1;410097-48-2;463929-80-8;1059626-26-4
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CAS No:
Description
Bordeaux powder
5,5'-Nitrilodibarbituric acid ammonium derivative. Used as an indicator for complexometric titrations.
Characteristics
170
-1.81120
Reddish-violet Solid
1.5756 (rough estimate)
300 °C
480.8°C at 760 mmHg
H2O: Slightly soluble
Storage temperature: no restrictions.
Safety Information
NONH for all modes of transport
3
22-40
24/25-22-36/37
Xn
Stable at room temperature in closed containers under normal storage and handling conditions.
Drug Information
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant and Hackh's Chemical Dictionary, 5th ed, p301, p499) (See all compounds classified as Indicators and Reagents.)
Acid Ammonium Purpurate
Murexide Use and Manufacturing
10g of chromium trioxide, 4g of water and 40g of glacial acetic acid were heated and dissolved, cooled to 30°C, and 16g of bartoic acid was slowly added in batches to control the reaction temperature of 45-50°C. After the addition was completed, it was incubated for half an hour at 50°C, left overnight, 10 g of glacial acetic acid was added, and the crystals were collected by filtration. Mix 4g of crystals with 8g of water to heat and dissolve, and filter out insolubles. The filtrate was transferred into ammonium acetate-glacial acetic acid solution to pass ammonia, crystals were precipitated, filtered and washed with boiling ethanol to obtain ammonium purpurate.
Indicator for complexometric titrations.
Computed Properties
Molecular Weight:284.19
Hydrogen Bond Donor Count:5
Hydrogen Bond Acceptor Count:7
Rotatable Bond Count:1
Exact Mass:284.05053200
Monoisotopic Mass:284.05053200
Topological Polar Surface Area:170
Heavy Atom Count:20
Complexity:508
Covalently-Bonded Unit Count:2
Compound Is Canonicalized:Yes
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